Engineered for commercial and industrial applications, the Square D LX36600 is a 600A, 3-pole molded case circuit breaker. It delivers reliable solid-state protection for heavy-duty electrical systems. This legacy breaker mounts into Square D I-Line panelboards and switchboards. For new installations or upgrades, it is replaced by the PowerPact LJA36600U43X, which requires an HNM1BL filler plate to adapt the footprint.
Load Side Lugs Included, Line Side Panel Connectors
Standards
CSA C22.2 No. 5, IEC 60947-2, NEMA AB-1, UL 489
Approval
CE, CSA, IEC, NOM, UL
Temp Rating
40C
Product FAQs
5 answers
Which panelboards are compatible with the LX36600 circuit breaker?
This breaker is designed exclusively for Square D I-Line panelboards and switchboards. It utilizes a plug-in mounting style with jaws that engage directly with the I-Line bus stack.
What type of wire and gauge range is accepted by the lugs on the LX36600?
The factory lugs accept two conductors per phase, ranging from 4/0 AWG to 500 kcmil. You can terminate using either aluminum or copper wire.
How does the Micrologic Series B LSI trip unit function on this breaker?
The LSI designation means the electronic trip unit allows you to adjust the Long-Time, Short-Time, and Instantaneous trip settings. This provides precise coordination with other breakers in your electrical system compared to standard fixed thermal-magnetic units.
Is the LX36600 part of a current production series?
The LX series is classified as a legacy L-frame molded case circuit breaker. While newer PowerPact L-frame breakers are used in modern installations, the LX36600 remains a direct plug-in replacement for existing I-Line systems without requiring bus modifications.
Does the LX36600 require a separate mounting bracket for installation?
No. As an I-Line plug-in breaker, it features integrated mounting jaws that attach directly to the busbar assembly in I-Line panelboards, eliminating the need for separate mounting hardware or backpan drilling.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 1 review.